Electric switch



Oct 25,

F. M. MAUK ELECTRIC SWITCH Filed July 29. 1926 Patented Oct. 25, 1927.

FREDERICK' M; MAUR, on rRizzsco'rr,` ARIZCNHV Y l VELECTRIC 'svvi'ilcml A-ppiication ined my 29, 1926. `seniaino. li2'`5 ,7311" ."f l' This invention relates to electric switches, and` liasfor one of its objects-to provide a novel, simple andrhighlyeiiicient device of this character through the mediumlof which,

one series of a plurality of seriesof tuning instruments, the tuninginstr'uments-L of` the respective series being y' offdiiferent inductance, may besimultaneously connectedV in the circuit of a radioureceiving apparatus'f provision of a v` switch of this character through -thefmedium-Lof which one series of the tuning instruments and a fixed condenserfmay be Vconnected in the'circuit ofia radio 5, receiving apparatus'` i W'ith the foregoing andv other objects view, Vthe nature of which will be-come appart-i entfas the description proceeds, the invention i consists of the novel construct-ion, Vcombina'- 2O tion and arrangement, of vparts'hereinafter,

fully described and claimed, andillustrated inthe accompanying drawings, wherein:

Figure 1 is L top plan view of the switch adjusted to connect oneseriesof thetuning 'l instruments and affiXed condenser ,in the y in the bores 11 ofthebarrier 7, and secured circuit of a radio. receiving apparatus,`

FigureZ switch, Y 'Figure 3 is a; longitudinall sectionalfview a taken yon thevertical planeindicatedby the f bersor ,parts ofthezbrushes 17j are'posi*V tionedjin the V efuideways or groovesvlOf'and line-.S-S'of Figure 1, Y,

: Figureyxis a transverse-*sectional viewj taken on thevertical plane indicated bythe line 4-4 ofjFigure` 3,

one `ofthe bladeslof the switch, and i.

Figure' 6 is asimilar viewfof thev other` blade `of the switch.

Corresponding .and

toiin the following.,descriptiomand designated inthe several views of the yaccompanyingfdrawing, by4 similar reference characters;

...The switchcomprises a base l'which may be made of any suitableinsulating material formation. Thebasclfis hollow and is provided with brackets 2" to 'permit'git V toi Vbe i. readily secured in applied position.. Bars 3 are secured to :and extend.acrossthe'ends' ends of the'shafts 5 and are forked, and

positioned in said ends are the ends of a ff brush carrier 7 The carrier 7 may be made of any suitable insulating material, and is A further object of the invention is the' is falvieW inrearelevationofthef Y taining-clipsfl. .Brushes 17: are`isecuredr-t'of theother endsxof therods :15,and are pref-A Figure 5 is a detail perspective view of `like parts are-referred and` isof .substantiallysemicylindrical secured to theshafts y5 and 6 by rivetsi -or other ,suitablef elements .f The carrier 7 is preferablyl of rectangularV formation, and isv secured to the shafts 5 andv 6. adjacent one of;

its .longitudinaledges. VAdjacent' the other longitudinal edge` thereof,- the carrier v'l' provided relatively spaced lugs or projections'Q which extend'laterally from its opposite sides, The lugs 9 at one side lof the carrier 7rv are alined with those at the other side vof the carrier, and suchparts provide1 guide waysor grooves-10; The-car` rier 7 'is provided withf bores11 which .exif

tend transversely. therethrough y and are lo;

cated in alinement with theguide ways or` grooves 10.' i l A Series of contactblocks12 aresec'ured to the base 1 :by .meansfof-bolts 13 to whichI are 'alsof secured wirefretaining clips 14,

Each series Ioffcontact,blocksf12' extend lon` gitudinally ofthe base4 1 and the respective series -of contact blocks lare y preferably equallyV spaced. The contactblocks `12 are locatedl within, rand, the clips 14 externally of the base 1.v 1Rods.15,fare slidably `mounted tofcertain adjacent.endsthereof,arewirere-- erablyof yinverted lUfform. The-'side mein-V due thereto the ,ro,ds 15` and the parts carried blocks 12 so as :to establisha goodelectri-v cal Contact between these lpartsQand this is4 l accomplishedY by springs 18 mounted on the cent edgevof thelcarrien'.,

rods 15 between-the brushes land theadjay `'The. iiuniber of brushes 17 mcniiitedy ori-they carrier 7correspondsdo,thev number of f conf tactibloclgs` in each,;serie`s, and the brushes are. adapted "to, be. moved into AContact with each series ofblocks 12fthroughthermedium i i l .of almobA 19A secured tothe front shaft- -5` A Thereis also secured' tofthis shaft, a pointer 20 whichjin conjunction `witha dial-on the panelf of theggradid receiying@instrument in Y connection i with which theswitchis' used, ,is adapted, te edeatevith aridi-gefeest the? -blcks 12 Ithe brushes 17 arein Contact Contact strips 21 Vand 22 :are secured to the base 1 and projectbeyond the rear end thereof. Blades 23 and 24 are secured to the rear shaft 6,-and are adapted in one position of the carrier 7 to Contact with the strips 21 and 22, respectively. VThe blades 23 and 24 are resilient and are insulated from each other as shown at 25. Spring clips 26 and 27 carried by the blades 23 and 24, are adapted to support a Xed condenser 2S and electiically connect the saine to the blades. v

1n practice, a set of two tuning instruments of the sameor different inductance, are connected to each series of the Contact blocks 12, the ciicuit wires are connected to the brushes 17, and a variable condenser is '1 connected to the Contact strips 21 and 22. By turning the carrier 7 through the me-.

i Without switching .the condenser 278 in circuit with the variable condenser. By moving the carrierk 7 so as to position the blades 23 and 24 in contact with the strips 21 and 2 2, the condenser 28y will be switched inv circuit with the variable condenser, and at the same.

time one of the setsoil timing instruments will be switched into the circuits, this being brought about by reason of the fact that, when the blades 23 and 24 are in contact i. with the strips 21 and 22, the brushes 17 are in contact with the adjacent series of blocks 12.y y y twocircuits to be timed to any one o fhfour dijterent wave bands. vFor each additional circuit that isy to be controlled by means of tlie'switch, two additional contacts are added Y to the carrier 7 and an additional series of Contact blocks is .added to the base l. It desired, theA base linay be made of cylindrical formation in orderA tol adapt it to carry the maximum number of series Aof contact blocks. The switch may be used for purposes other than that set forth, as will be readily apparent to those skilledv in the art.

Where a .variable condenser is desired in place of the fixed condenser 28 such condenser. is removed from the clips 26 and 27 and ileXible leads connected to a variable condenser fastened to the panel are soldered to the clips. In order4 to provide each waveband witha condenser of suitable capacity, a set of strips like 21 and 224 are pro'videdfor each waveband and the leads which run from the tuning condenser to 21l and` 22 are changed to the clips on. the switch blades, where they are soldered, and the leads y from all the other variable condensers are attached to the wave bands to which they'belong through.

rThe switch structure shown will enable` strips such as 21 and 22 which are placed on the Vedge of the base in the saine position relative to their own tuning instruments as 21 and 22 are placed relative to theirs. This arrangement makes it possible for one radio set to contain permanent coils and condensers necessary to cover all wave bands.

It should be understood that the drawing is merely illustrative and does not pretend to give exact proportions. Furthermore the .saidA drawing is illustrative of a preferred construction, itpbeing my expectation that various changes and modifications may be made without departing from the spirit and scope of my invention. v

What is claimed is:

1. A switch comprising a base, contacts carried by the base, blades, `means movably supporting the blades from the base, means insulating the blades, and an instrumentv support-ing clips carried by the blades. y i

2. Aswitch comprising abase, contacts carried by the base, blades, meansmovably supporting the blades on'tlie base, means insulating the blades,.and a condenser carried by and electrically connected to the blades. Y

3. A switch comprising` a base, a plurality of relatively spaced series of contact Vblocks secured to the base, a carrier, brushes supported by the carrier, means for mounting the carrier to permit the rbrushes to be moved into contact with any series of blocl{s,'con tact strips ycarried by the base, blades insulated ,from each other and supported by the carrier for cooperation with the contact strips, anda condensercarried by and elec# trically connected to the blades.

4L. A switch comprisinga base, a series of contact blocks secured to the base, a carrier, brushes supported by the carrier, contact strips secured to the base, blades insulated from each other and supp'ortedby the carrier, means for Amounting the carrier to permit the brushes and blades to be siinultaneously moved into contact with said blocksv and strips, and a condenser carriedv by and electrically connected to the blades.

5. A switch comprisingL a base, a rotatably supported carrier, contact blocks secured to'. the base, ,rods'extending through and slidably supported by the: carrier, brushes secured `to corresponding ends of the rods and contacting withthe carrierl to prevent the rotation of the rods vwith respect to the carrier, clips carried by the other ends ot' the rods, and springs urging the brushes inthe direction of the Contact blocks.

1n testimony whereof 1 aiiix my signature.

FREDERICK M. MAUK. 

